Ouro River Nature · O Valadouro, Mariña Central, Lugo The Ouro river rises in the Sierra del Xistral, in the parish do Pereiro, at 700 or 800 metres above sea level, and flows through the municipalities of O Valadouro, Alfoz do Castrodouro and Foz over some 30 kilometres before reaching the ría de Fazouro; along its course it receives the Guilfonso, which forms the fervenza do Escouridal, and marks the natural boundary between O Valadouro and Alfoz do Castrodouro, known as the Val do Ouro. Its banks and estuary are protected as a special area of conservation; in the upper stretch rapids, clear waters and common trout abound, while towards the valley it widens into meanders, still stretches and pools, and in its lower part, in the parishes of Santo Acisclo and Fazouro, the sea trout that swims up the river from the ría to spawn can be fished. Photo: Iago Casabiell González (CC BY-SA 4.0) What to see and do in O Valadouro